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A video game costs \( \$ 60 \) today. If the inflation rate is \( 4.75 \% \) and is compounded continuously how much will this same video game cost in 5 years?

Ask by Graham Campos. in the United States
Jan 23,2025

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Answer

The video game will cost approximately \$76.08 in 5 years.

Solution

To find the cost of the video game in 5 years with continuous compounding, we can use the formula for continuous compounding: \[ A = P \times e^{r \times t} \] Where: - \( A \) is the amount after time \( t \), - \( P \) is the principal amount (initial cost of the video game), - \( r \) is the annual inflation rate, - \( t \) is the time in years. Given: - Initial cost of the video game, \( P = \$60 \), - Inflation rate, \( r = 4.75\% = 0.0475 \), - Time, \( t = 5 \) years. Substitute the given values into the formula to find the cost of the video game in 5 years. Calculate the value by following steps: - step0: Calculate: \(60e^{0.0475\times 5}\) - step1: Multiply the numbers: \(60e^{0.2375}\) - step2: Convert the expressions: \(60e^{\frac{19}{80}}\) - step3: Rewrite the expression: \(60\sqrt[80]{e^{19}}\) The cost of the video game in 5 years with continuous compounding is approximately $76.08.

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To calculate the future cost of the video game due to inflation, we can use the continuous compounding formula, which is given by: \[ A = Pe^{rt} \] Where: - \( A \) is the amount of money accumulated after time \( t \). - \( P \) is the principal amount (the initial cost of the game, which is \( \$60 \)). - \( e \) is the base of the natural logarithm (approximately \( 2.71828 \)). - \( r \) is the annual interest rate (inflation rate in this case, which is \( 0.0475 \)). - \( t \) is the time in years (which is \( 5 \)). Plugging in the values: \[ A = 60e^{0.0475 \times 5} \] First, calculate \( 0.0475 \times 5 \): \[ 0.0475 \times 5 = 0.2375 \] Now calculate \( e^{0.2375} \): \[ e^{0.2375} \approx 1.2684 \] (using a calculator or mathematical software) Now plug it back into the equation: \[ A \approx 60 \times 1.2684 \approx 76.11 \] So, the video game will cost approximately \( \$76.11 \) in 5 years when accounting for continuous inflation at a rate of \( 4.75\% \).

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